AMX SIP Communications Gateway CSG-500 - Manual (Page 28)

Telephone System Configuration
20 CSG SIP Communications Gateway Operation/Reference Guide
Once you have made the configuration changes to your hardware which you require, click Save Changes. A
message will display letting you know that for these changes to be completed, you must reboot your CSG.
Click Options on the left menu, select the Reboot tab, and then click Reboot Now to reboot your appliance.
Rebooting your CSG will terminate any active calls.
Trunk Configuration
Now that you have configured your analog hardware (assuming your unit had any) you are ready to set up your
trunk lines. Trunks are outbound lines used to make calls. Trunks can be either analog or VoIP. Click Trunks
from the main menu to access the trunk configuration page.
Advanced Analog Options (Cont.)
Echo
Cancellation NLP
Type This option enables you to specify the type of Non Linear
Processor (NLP) you want applied to the post echo-cancelled
audio reflections received from analog connections. There are
several options:
• None - This setting disables NLP processing and is not a
recommended setting. Under most circumstances, choosing
None will cause some residual echo.
• Mute - This setting causes the NLP to mute inbound audio
streams while a user connected to the appliance is speaking.
For users in quiet environments, Mute may be acceptable.
• Random Noise - This setting causes the NLP to inject random
noise to mask the echo reflection. For users in normal
environments, Random Noise may be acceptable.
• Hoth Noise - This setting causes the NLP to inject a low-end
Gaussian noise with a frequency spectrum similar to voice. For
users in normal environments, Hoth Noise may be acceptable.
• Suppression NLP - This setting causes the NLP to suppress
echo reflections by reducing the amplitude of their volume.
Suppression may be used in combination with the Echo
cancellation NLP Max Suppression option. For users in loud
environments, Suppression NLP may be the best option. This is
the default setting for the Echo Cancellation NLP Type option.
Echo
Cancellation NLP
Threshold This option enables you to specify the threshold difference, in dB,
between the received audio (post echo cancellation) and the
transmitted audio, at which time you want the NLP to engage.
The default setting is 24 dB.
Echo
Cancellation NLP
Max Suppression This option, only functional when the Echo Cancellation NLP
Type option is set to Suppression NLP, specifies the maximum
amount of dB that the NLP should attenuate the residual echo.
Lower numbers mean that the NLP will provide less suppression
(the residual echo will sound louder). Higher numbers, especially
those approaching or equaling the Echo Cancellation NLP
Threshold option, will nearly mute the residual echo. The default
setting is 24 dB.
The VPM Settings section will not be visible on older hardware revisions of the CSG.
FIG. 13 Trunk Configuration Page